Illuminant



FIG. 1 is a left side view of an illuminant;

FIG. 2 is a front view of the illuminant of FIG. 1;

FIG. 3 is a rear view of the illuminant of FIG. 1;

FIG. 4 is a bottom view of the illuminant of FIG. 1; and,

FIG. 5 is a top view of the illuminant of FIG. 1.

The portions of the illuminant shown in broken lines form no part of the claimed design. 

The ornamental design for an illuminant, as shown and described. 